Questions tagged [circuits]
The circuits tag has no summary.
252 questions
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Circuit Analysis Exercise Help (KVL, KCL)
I have a question about a circuit analysis exercise I had in an exam. I think that my solution is fine, but they gave me only 9 points of 20. Skipping (a) question whose answer is 0.398 Ω, can you ...
- 23
0
votes
2
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168
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Why does the LED not immediately turn on in this circuit?
This circuit is from the book Make: Electronics (3rd ed., by Charles Platt, publisher Maker Media). The most confusing part is that when the button is on, why does the LED not turn on immediately, ...
- 1
0
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0
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86
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How to extract .raw file from xschem/ngspice?
I would like to learn the gm/id technique in xschem and ngpsice. I am following this tutorial (https://iic-jku.github.io/analog-circuit-design/analog_circuit_design.html#fig-mosfet-diode-loopgain-tb) ...
- 67
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To find the value of I4 using KVL
This is a very simple question, and I am unsure whether we can use KVL when there is a dependent source.
This is my method of solving this question where I have done -
V1 + V4 -4I2 - V3 + V2 = 0
And ...
2
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1
answer
265
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Get rid of PWM delays
I have a drone flight controller that outputs a OneShot125 2 kHz PWM signal. The pulse width varies between 125 µs and 250 µs and represents the information being transmitted. The flight controller ...
- 45
1
vote
1
answer
113
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Single Ended Differential Amplifier with a Collector Resistor On Only One Branch
I am supposed to calculate the differential gain of the following amplifier:
where the inputs are fed from a previous stage. the relevant DC bias values:
V+ = 15 V
Vin1 = Vin2 = 11.3 V
I = 1.474mA
I ...
- 35
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0
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55
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I can't get the right answer when I use test source method
It's a 250 volts source connected to 5-j10 impedance, the dependent source has a value of Vdelta/5 where Vdelta is the voltage across the j5 impedance.
2
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4
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327
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Find maximum and minimum between 2 and 3 Numbers
I have a problem to solve that is to prepare for some exams, and I've been trying to solve it for days, and I can not think of anything.
The problem:
Design a circuit that, given 3 numbers of 4 bits ...
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4
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2
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380
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Mesh analysis method
\begin{align}
a &= 7\\
b &= 4\\
x &= a-b-N_i+1\\
&= 7-4-1+1\\ &= 3
\end{align}
\begin{align}
4I_4 &+& 10I_3&-&5I_2 && &=0\\
240 &+& 40 I_1&+&...
5
votes
4
answers
645
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How do you use matrices to solve circuit analysis problems?
Up until now, I've only known how to solve circuit analysis problems by using systems of linear equations, but from my research, I have come to understand that matrices are a much faster method of ...
- 511
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1
answer
120
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One-Key Power On/Off Circuit Analysis
I am analyzing and adding a one-key power on/off circuit. VOUT is the power supply for the microcontroller, and the continuous activation of the PMOS is controlled by the microcontroller through Q1. ...
- 101
3
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1
answer
152
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Circuit to make an autonomous slot car
I'm a CS undergrad and not an EE, so this is my first time trying to wrap my head around electricity and how circuits work.
The overall idea of my project is to train a simple model using Q-Learning ...
- 31
2
votes
1
answer
382
views
What exactly causes current to flow through a circuit/material?
When researching this topic (and having it referenced to me in other questions that I have asked here), I found this image in reference to the electric field that is established by the charge ...
- 511
1
vote
5
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Why exactly is capacitance equal to both Q/V and εA/d?
I understand that capacitance is just a coefficient attached to a given capacitor and describes how much charge is required to increase the potential difference across the plates, but what exactly ...
- 511
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9
answers
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Why does the voltage drop across a given resistor change when I add more resistors to a circuit?
Why exactly does the voltage drop in R1 change when I add another resistor to the circuit? I understand that it has to change according to Ohm's Law (V = IR), but how does the amount of charge moving ...
- 511